Why did the USA lose the Vietnam War?

Write an explanation AND cite a source which shows the importance of the following six factors:

1. US military tactics in Vietnam
The U.S military tactics used in Vietnam were not effective because the Viet Cong was using guerrilla tactics which were far more informal. The use of Napalm bombs and Agent Orange were tactics that were dubbed inhumane by the American Public. These bombs had chemical effects on the people of vietnam and was burning people's skin like in the picture of burning children(source 42) Another tactic was search and destroy. This was ineffective because they found little Viet cong and killed more civilians. Other ineffective tactics were the bombing of viet cong and ancient hue (source 41) which caused american uproar against the war.

2. The unpopularity of the South Vietnamese regime
Unfortunatley in the Vietnam War the U.S supported Diem who's regime was extremely corrupt. He was very anti-communist and and had little respect for buddhism. Buddhist priests were very radical in protesting against this corruption by burning themselves alive in a meditative trance( Source 33). if Diem was never in power people would have not felt the need to form Viet Cong.

3. The experience of the Viet Cong and the inexperience of the American soldiers
The Viet Cong had far more experiance than the U.S because it was their homeland and they knew the lay of the land far more in detail than the young american soldiers. Their tactics in source 37 kept the U.S on edge through out the war.

4. Domestic opposition to the war in the U.S.
After My Lai when information was leaked to the U.S public, much faith was lost in America because the brutal attack was done on innocent people. (source 50) also with the pictures of the burning vietnemese children from the Napalm and Agent Orange bombs. These pieces of evidence angered the U.S public and alot of people lost respect for the army.

5. Chinese and Soviet support for the Viet Cong
The Chinese and Soviet Union supported the Viet Cong by supplying them with weapons. The U.S was not wanted in Vietnam by the chinese at all. The Soviet Union just wanted the spread of communism in vietnam. America didnt have the support from anyone that Viet Cong had.

6. 'But did they really lose?' Summarize the argument put forward in Source 57, and your view on it.
Source 57 is making the argument that America didnt in fact lose the war but the South Vietnemese did. Mainly because the major loss of the war was in Saigon and the U.S had left Vietnam years before. In my opinion this was deffinatly a loss for the U.S because our main point was to defeat the spread of communism and we failed at that. It was a loss for american morals.
Add other if you think there are factors you should consider.